You can cover most of their stops in 1hour bus ride (if you choose not to hop off at all and just wanna mainly enjoy the scenes from the bus). We hopped off at the Cathedral stop, it was one of the last few stops of the journey. It was apparently a perfect stop, as it happened to be very close (only 5 mins walking) to the hotel we were staying at, Hoan Kiem District, the heart of all the tourist spots. So if you also stay in Hoan Kiem area and plan to go home straight after the ride, I suggest you hop off at Cathedral Stop, so you can walk home and can save cost by not taking a Grab (online taxi) home. I started my bus ride at 2pm, didn’t hop off at all until stopped at the Cathedral at 3pm ish. All spots were a great choice, audio was clear, the tour guide greeting you at the bottom deck was friendly. All in all, convenient for lazy travellers like me. wear a hat + sunscreen, for sitting at the top deck (bottom deck won’t be worth it, despite the aircon, believe me)